Glacial melting causes:
A) no detectable change in sea level, because of the large volume of the ocean.
B) a decrease in sea level.
C) an increase in sea level.
D) a decrease in average temperature.
Question 2
Which two gases account for more than 90 of changes in the greenhouse effect?
A) methane and carbon dioxide
B) methane and nitrogen
C) carbon dioxide and water
D) carbon dioxide and nitrogen